10.58.1. Feature Description 
The parameter XFBADIAL in AMO FEASU activates this feature
centrally in a system. It allows consultation hold before end of dialing
for the first connection.
Alternatively, this feature can be activated using the parameter XFBACALL
in AMO FEASU. This feature allows consultation call either after end
of dialing (free or non-evaluated) for the first connection or from the
time when the call was routed into the analog network.
Only one of the two parameters may be set.
The second alternative must be used, if features such as returning
FWD/BUSY, LCR rerouting or LCR expensive routing are to be used on the
S0/S2 trunk group of the first connection.
To prevent unauthorized use of this feature the parameter SUTVA
in AMO COSSU can be configured.
In order to be able to use "Transfer before Answer ex Call State"
for outgoing trunk and tie traffic, the COT parameter TRBA must
be set locally in the S0/S2 B channel trunk group of the first connection
in the originating node. It is of no importance whether the first connection
is routed in the own or an external network (e.g. PTT) or whether the
called party is located in the own or an external network.
Consultation call for an outgoing connection via S0/S2 activated by
an authorized station for a voice service can be initiated only after
the system received the acknowledgment of the first connection and the
FEASU parameter "Extension Transfer Before Answer ex Dial State"
is set. An ANATE can initiate consultation call without consultation
key only after it received the end of dialing (free or non-evaluated)
acknowledgment, as the consultation function is derived from the dialing
information.
Otherwise, consultation call for an outgoing connection via S0/S2
activated by an authorized station for a voice service can be initiated
only after the system received the end of dialing (free or non-evaluated)
acknowledgment of the first connection, or from the time when the call
was routed into the analog network and the parameter XFBACALL
in AMO FEASU is set.
IMPORTANT:
Up to now consultation call could only be initiated
from the station after the first call entered talk state.
If the outgoing S0/S2 first connection (preferably a trunk call) is
in call state or digit-sequence transmission, the A station can transfer
the first connection to station C who is on consultation hold and has
answered. Station C can be located internally in the system or in a network
which is connected via S0/S2.
The first call (via S0/S2) can only be transferred, if one of the
two connections is in talk state.